improved error handling, removed RC=$? noops #46

Job	Run time
build-debian (unstable)	38s
build-debian (trixie)	32s
build-debian (bookworm)	35s
build-debian (bullseye)	49s
test-debian (unstable, trixie)	38s
test-debian (unstable, trixie, mmdebstrap)	44s
test-debian (unstable, bookworm)	41s
test-debian (unstable, bookworm, mmdebstrap)	57s
test-debian (unstable, bullseye)	41s
test-debian (unstable, bullseye, mmdebstrap)	45s
test-debian (unstable, buster)	38s
test-debian (unstable, buster, mmdebstrap)	41s
test-debian (unstable, stretch)	38s
test-debian (trixie, trixie)	41s
test-debian (trixie, trixie, mmdebstrap)	43s
test-debian (trixie, bookworm)	36s
test-debian (trixie, bookworm, mmdebstrap)	43s
test-debian (trixie, bullseye)	37s
test-debian (trixie, bullseye, mmdebstrap)	56s
test-debian (trixie, buster)	39s
test-debian (trixie, buster, mmdebstrap)	58s
test-debian (trixie, stretch)	38s
test-debian (bookworm, trixie)	51s
test-debian (bookworm, trixie, mmdebstrap)	57s
test-debian (bookworm, bookworm)	37s
test-debian (bookworm, bookworm, mmdebstrap)	1m 11s
test-debian (bookworm, bullseye)	52s
test-debian (bookworm, bullseye, mmdebstrap)	58s
test-debian (bookworm, buster)	47s
test-debian (bookworm, buster, mmdebstrap)	40s
test-debian (bookworm, stretch)	48s
test-debian (bullseye, bookworm)	46s
test-debian (bullseye, bookworm, mmdebstrap)	38s
test-debian (bullseye, bullseye)	47s
test-debian (bullseye, bullseye, mmdebstrap)	55s
test-debian (bullseye, buster)	36s
test-debian (bullseye, buster, mmdebstrap)	44s
test-debian (bullseye, stretch)	39s
	28m 14s

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